[llvm] [XCOFF] Support the subtype in Dwarf section headers (PR #81667)

[James Henderson via llvm-commits]

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@@ -64,6 +64,11 @@ template <typename T> uint16_t XCOFFSectionHeader<T>::getSectionType() const {
   return DerivedXCOFFSectionHeader.Flags & SectionFlagsTypeMask;
 }
 
+template <typename T> int32_t XCOFFSectionHeader<T>::getSectionSubtype() const {
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jh7370 wrote:

Why is this returning a signed value, especially given that the section type is an unsigned return?

https://github.com/llvm/llvm-project/pull/81667